<template>
  <div class="login_container">
    <!-- 登录大盒子 -->
    <div class="login_box">
      <!--头像区域 logo盒子 -->
      <div class="avatar_box">
        <img src="../assets/logo.png" alt="" />
      </div>
      <!-- 登录表单区域 -->
      <el-form ref="loginFormRef"
        :model="loginForm"
        :rules="loginFormRules"
        label-width="0px"
        class="login_form"
      >
        <!-- 用户名 -->
        <el-form-item prop="username">
          <el-input
            v-model="loginForm.username"
            prefix-icon="iconfont icon-user"
          ></el-input>
        </el-form-item>
        <!-- 密码 -->
        <el-form-item prop="password">
          <el-input
            v-model="loginForm.password"
            type="password"
            prefix-icon="iconfont icon-3702mima"
          ></el-input>
        </el-form-item>
        <!-- 按钮区域 -->
        <el-form-item class="btns">
          <el-button type="primary" @click="login">登录</el-button>
          <el-button type="info" @click="resetLoginForm">重置</el-button>
        </el-form-item>
      </el-form>
    </div>
  </div>
</template>

<script>
export default {
  data() {
    return {
      // 这是登录表单的数据绑定对象
      loginForm: {
        username: "admin",
        password: "123456",
      },
      // 这是表单的验证规则对象
      loginFormRules: {
        // 验证用户名是否合法
        username: [
          { required: true, message: "请输入登录名称", trigger: "blur" },
          { min: 3, max: 10, message: "长度在 3 到 10个字符", trigger: "blur" }
        ],
        // 验证密码是否合法
        password: [
            { required: true, message: "请输入登录密码", trigger: "blur" },
          { min: 6, max: 15, message: "长度在 6 到 15个字符", trigger: "blur" }
        ],
      },
    };
  },
  methods:{
    // 点击重置按钮，重置登录表单
    resetLoginForm(){
      // console.log(this);
  this.$refs.loginFormRef.resetFields();
    },
    login(){
      this.$refs.loginFormRef.validate(async valid=>{
        if(!valid) return 
       const {data:res}=await this.$http.post("login",this.loginForm);
        // console.log(result);
        // console.log(res);
        if(res.meta.status !==200) return this.$message.error("登录失败！");
        this.$message.success("登录成功！");
        // 1.将登录成功后的token，保存到客户端的sessionstorage中
        // 1.1项目中除了登录之外的其他API接口，必须在登录之后才能访问
        // 1.2token只应在当前网站打开期间生效，所以将token保存在sessionStorage中
        window.sessionStorage.setItem("token",res.data.token);
        // 2.通过编程式导航跳转到后台主页，路由地址是/home
        this.$router.push("/home");
        // console.log(res);
      })
    }
  }
};
</script>

<style lang="less" scoped>
.login_container {
  background-color: #2b4b6b;
  height: 100%;
}
.login_box {
  width: 450px;
  height: 300px;
  background-color: #fff;
  border-radius: 3px;
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
}
.avatar_box {
  height: 130px;
  width: 130px;
  border: 1px solid #eee;
  border-radius: 50%;
  padding: 10px;
  box-shadow: 0 0 10px #ddd;
  position: absolute;
  left: 50%;
  transform: translate(-50%, -50%);
  background-color: #fff;
  // 嵌套样式
  img {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    background-color: #eee;
  }
}
.login_form {
  position: absolute;
  bottom: 0;
  width: 100%;//占满横向区域
  padding: 0 20px; //设置输入框与表单边距有些距离
  box-sizing: border-box;
}
.btns {
  display: flex;
  justify-content: flex-end;
}
</style>